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LONG-RUN MARGINAL COST: The change in the long-run total cost of producing a good or service resulting from a change in the quantity of output produced. Like all marginals, long-run marginal cost is the increment in the corresponding total. What's most notable about long-run marginal cost, however, is that we are operating in the long run. Unlike the short run, in which at least one input is fixed, there are no fixed inputs in the long run. As such, there is only variable cost. This means that long-run marginal cost is the result of changes in the cost of all inputs.

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TROUGH

The transition of a business-cycle contraction to a business-cycle expansion. The end of a contraction carries this descriptive term of trough, or the lowest level of economic activity reached in recent times. A trough is one of two turning points. The other, the transition from expansion to contraction, is a peak. Turning points are important because they represent the transition from bad to good or good to bad.

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Today, you are likely to spend a great deal of time at a crowded estate auction wanting to buy either clothing for your pet iguana or a set of hubcaps. Be on the lookout for small children selling products door-to-door.
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North Carolina supplied all the domestic gold coined for currency by the U.S. Mint in Philadelphia until 1828.
"Lord, where we are wrong, make us willing to change; where we are right, make us easy to live with. "

-- Peter Marshall, US Senate chaplain

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